Combination controlled padlock



Aug. 23, 1955 w. MATHES 2,715,828

COMBINATION CONTROLLED PADLOCK Filed Sept. 8, 1955 INVENTOR. ML 4 men N9 7195s United States Patent COMBINATION CONTROLLED PADLOCK Willard Mathes, Terryville, Conn., assignor to The Eagle Lock Company, Terryville, Conn., a corporation of Connecticut Application September 8, 1953, Serial No; 37 8,720

3 Claims. (Cl. 70-25) This invention relates to a combination controlled padlock and more particularly to the provision, in a padlock of the permutation type, of novel locking bolts for retaining the shackle of the padlock in locked position.

The primaly object of the present invention is-to provide a padlock in which each leg of the shackle member thereof is retained in locked position by a separate bolt to provide a maximum degree of security.

Another object of this invention is to provide a padlock having a pair of rotatably mounted bolts, as distinguished from the conventional pivotally mounted bolts,

each of which engages one of the legs of the shackle.

A further object of the invention is the provision of apadlock having a pair of bolts and in which motion of the main bolt is transmitted to the auxiliary bolt through interengaging means thereon such as gear teeth or the like.

A still further object of the invention is the provision of a padlock having'a bolt supporting structure which renders the lock strong and yet inexpensive to produce.

Further objects and advantages of this invention will be more clearly understood from the following description and the accompanying drawings in which:

Fig. 1 is a front view of the lock, with the dial removed, illustrating the locking bolts and showing the same in locked position.

Fig. 2 is a side view of the padlock in central vertical section.

Fig. 3 is a view similar to Fig. 1, but illustrating the position of the bolts when the shackle is in unlocked position.

Fig. 4 is an enlarged fragmentary side view of the main bolt taken on line 44 of Fig. 1.

Fig. 5 is a similar view, but of the auxiliary bolt, taken on line 5-5 of Fig. 1.

Fig. 6 is a front view of the bolt supporting plate provided in the lock.

Fig. 7 is a side view thereof.

Fig. 8 is a front view, on an enlarged scale, of the main bolt employed in the lock.

Fig. 9 is a side view thereof.

Fig. 10 is a front view, on an enlarged scale, illustrating the auxiliary bolt employed in the lock.

Fig. 11 is a side view of said auxiliary bolt.

For the purposes of illustration, 1 have shown my improved locking bolts incorporated in a permutation padlock of conventional design which is familiar to those skilled in the art. Said padlock includes a case 5 including a rear wall 5-a and an annular wall 5b. The rear wall of the case has a pin 6 secured thereto and upon which is rotatably mounted a dial 7 having a centrally disposed knob 7a extending therefrom. The dial 7 is rotatably retained on the pin 6 by an annular flange S which is disposed behind an inwardly turned rim 9 extending from the Wall 5-17.

A disc tumbler 19, of conventional form, is non-rotatably secured to the dial 7 and is adapted to operate a plurality of similar disc tumblers 1111 which are roillustrated in Fig. 1.

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tatably mounted on the pin 6 and are'separated by spac ing washers 1212. A spring member 13is provided to retain the tumblers inproper position. It will be noted that each of said tumblers is provided with a gate 14 which is adapted to be aligned with the gates of the adjacent tumblers upon rotation of the dial in accordance with the predetermined combination.

Said look also includes a U-shaped shackle 15 having a toe portion 15"aand a heel portion 15-bwhich are re-' ceived in openings in" thewall"5b of'the 'case; the heel portion 15b of the shackle being slidably supported in a lug 16 extending from said wall. The toe and the heel of the shackle are provided with notches 17 and 18, re= spectively, for the reception of the locking portions of my improved bolts.

The bolt structure embodying the present invention includes a supporting plate 19 having spaced holes 20'and 21 extending therethrough and perpendicularly extend ing flange portions 22 and 23 along its upper'edge which are disposed on arcs having their centers at the axis of the holes 20 and 21 respectively. Said supporting plate is secured to the rear wall S-a of the case 5' by rivets 24- and 25 which also rotatably retain the main bolt and the auxiliary bolt in the case as best illustrated in Figs. 4 and 5;

The main bolt, generallyindicated at 26, includes a circular plate portion 27 having a portion of itsperiphery provided with gear teeth 28. Said plate portion has a hole 29 therethrough which receives'an' enlarged portion of the rivet 24 upon which the bolt is rotatably mounted. Said main bolt also includes an annular flange.3.0 which extends perpendicularly to the plate portion 27 of the bolt and around a portion of its periphery. The said flange terminates adjacent theupper edge of a notch 31v 7 in the plate portion 27, and its opposite end provides an abutment edge 32 for a purpose to be hereinafter described.

An L-shaped lug 33 extends perpendicularly from the plate portion 27 of the main bolt.

The auxiliary bolt, generally indicated at 34, includes a plate portion 35 having a centrally disposed hole 36 therethrough which receives the enlarged portion of the rivet 25 upon which the bolt is rotatably mounted and a portion of its periphery is provided with gear teeth 36. The plate portion of the auxiliary bolt has a flange 37 extending perpendicularly therefrom which terminates in a horizontal abutment edge 38.

When the main bolt and the auxiliary bolt are rotatably secured in the case and against the supporting plate 19 by their respective rivets 24 and 25, the gear teeth on the periphery of each of the bolts will be in interengagement and the flange portions thereon will be rotatably supported against the flange on the said supporting plate 19.

When the gates of the disc tumblers 10 and 1111 of the lock are out of alignment, the abutment edge 32 of the flange on the main bolt will engage the peripheries of said tumblers to retain said main bolt in locked position wherein the opposite edge of said flange is disposed in the notch 17 in the toe of the shackle. When in locked position, the abutment edge 38 of the flange on the auxiliary bolt 34 is disposed in the notch 18 in the heel of the shackle and said bolt is retained in locked position through the engagement of its gear teeth of the main bolt as clearly t will be noted that the flange portions of the main bolt and the auxiliary bolt are supported against their respective flange portions 22 and 23 on the supporting plate to thereby prevent bending of said flanges when outward pull is applied upon the shackle of the lock when in locked position.

When the dial 7 has been manipulated to align the gates in the disc tumblers, said gates will then be disposed under permit said main bolt and the auxiliary bolt to rotate. As

the shackle 15 is withdrawn, the main bolt and the auxilw iary bolt will be rotated to unlocked position, as illustrated in Fig. 3, wherein the end of the flange on the main bolt is disposed in the gates in the tumblers.

When the shackle is moved back into the casing towards locked position, the tapered surface 15c on the toe of the shackle will engage the lug 33 on the main bolt and,

as said shackle is depressed, will cause rotation of said t 1. In a permutation padlock including a case, a shackle.

movable in said case, and a plurality of tumblers rotatable in said case and having gatings adapted to be moved into alignment, a main bolt comprising a substantially circular flat plate rotatably mounted in said case and having a plurality of gear teeth along an edge portion thereof disposed on an are having its center at the axis of rotation of said plate, a flange projecting perpendicularly from an edge portion of said plate and extending partially there- 1 around and having a curved outer surface disposed outwardly of the ends of said gear teeth and co-axially therewith; one end of said flange being adapted to enter a notch in the toe of the shackle when in locked position and the opposite end of said flange providing an abutment adapted to engage said tumblers to prevent rotation of said main bolt out of locked position, an auxiliary bolt comprising a substantially circular flat plate rotatably mounted in said case adjacent said main bolt and having a plurality of gear teeth along an edge portion thereof disposed on an arc having its center at the axis of rotation of said plate and inter-engaged with the gear teeth on the main bolt, a flange projecting perpendicularly from an edge. portion of the plate of the auxiliary bolt and having a curved outer surface disposed outwardly of the ends of said gear teeth and co-axially therewith; one end of said flange being adapted to enter a notch in the heel of the shackle when in locked position, separate supporting means secured in said case and engaging the flange on each of said bolts when in locked position to provide a support thereof; the end of the flange on the main bolt engaging said tumblers being receivable in said gatings, when aligned, to permit rotation of said bolts and withdrawal-of said shackle, and means on said main bolt engageable by the shackle as it is moved toward locked position for causing rotation of said main bolt into locked position, said auxiliary bolt being rotated into locked position simultaneously therewith through said gear teeth.

2. The subject matter set forth in claim 1 wherein said supporting means include a pair of spaced curved flange members which overlie and engage the flanges on said bolts and each of which is co-axial with its respective bolt.

3. The subject matter set forth in claim 1 wherein said supporting means includes a plate that is secured to said case behind said main and said auxiliary bolts and is provided with a perpendicularly extending flange having spaced interconnected arcuate portions which overlie the flanges on the main and on the auxiliary bolts and are disposed co-axially therewith.

Great Britain Aug. 28, 1944 

